According
to the MPFS Ordinance, a self-employed person must join a registered scheme
within 60 days of the commencement of self-employment.

A
self-employed person can elect to contribute to the
MPF Scheme on either a
monthly or a yearly basis.

If
he contributes on a yearly basis, the "contribution year" will be
based on the financial period of the scheme which may not be the basis
period of assessment. He must make contribution before the last day of
the financial period.

Mandatory
contributions paid by a self-employed person to a registered scheme are
deductible expenses under Profits Tax subject to a maximum of $15,000 per
year.

If
he has also employment income, he is required to make contribution to a MPF
scheme as a self-employed person in addition to his contribution as an
employee. However, the maximum yearly tax deduction is only $15,000, usually
under Salaries Tax.